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.TH "PM_SEND_ALL" "9" "07 August 2003" "" ""
.SH NAME
pm_send_all \- send request to all managed devices
.SH SYNOPSIS
.sp
\fB
.sp
int pm_send_all  (pm_request_t \fIrqst\fB, void * \fIdata\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIrqst\fB\fR
power management request
.TP
\fB\fIdata\fB\fR
data for the callback
.SH "DESCRIPTION"
.PP
Issue a power management request to a all devices. The 
PM_SUSPEND events are handled specially. Any device is 
permitted to fail a suspend by returning a non zero (error)
value from its callback function. If any device vetoes a 
suspend request then all other devices that have suspended 
during the processing of this request are restored to their
previous state.
.SH "WARNING"
.PP
This function takes the pm_devs_lock. The lock is not dropped until
the callbacks have completed. This prevents races against pm locking
functions, races against module unload pm_unregister code. It does
mean however that you must not issue pm_ functions within the callback
or you will deadlock and users will hate you.
.PP
Zero is returned on success. If a suspend fails then the status
from the device that vetoes the suspend is returned.
.SH "BUGS"
.PP
what stops two power management requests occurring in parallel
and conflicting.
.SH "ABOUT THIS DOCUMENT"
.PP
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
.PP
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
.PP
For more details see the file COPYING in the source
distribution of Linux.
.PP
If you have comments on the formatting of this manpage, then please contact
Michael Still (mikal@stillhq.com).
.PP
This documentation was generated with kernel version 2.6.0.